#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#if判断
age = 20
if age >=6:
	print('teenager')
elif age >=18:
	print('adult')
else:
	print('kid')
#循环
list1 = ['lily','bob','lucy']
for name in list1:
	print(name)
sum = 0
for x in range(101):
	sum = sum + x
print(sum)
#===========================
sum = 0;
n = 50
while n>0:
	sum = sum+n
	n = n - 2
print(sum)
